Basically I made a glass/ cobble stone tunnel from my main house to my tree farm, and the built another glass/cobble stone tunnel around it and filled it with lava. I only managed to set myself on fire twice while making this :P

and here's the farm it connects too, just planted the wheat but it's slowly growing.

The lava tunnel got removed when the game/server glitched out and removed my chunk of land :'@
but I have re built it with MORE lava and glass, even threw in some water for good measure, if a creeper gets in there I'm screwed :E